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@@ -0,0 +1,162 @@
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+/*
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+ * HID driver for some a4tech "special" devices
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+ *
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+ * Copyright (c) 1999 Andreas Gal
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+ * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
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+ * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
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+ * Copyright (c) 2006-2007 Jiri Kosina
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+ * Copyright (c) 2007 Paul Walmsley
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+ * Copyright (c) 2008 Jiri Slaby
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+ */
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+
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+/*
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License as published by the Free
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+ * Software Foundation; either version 2 of the License, or (at your option)
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+ * any later version.
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+ */
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+
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+#include <linux/device.h>
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+#include <linux/input.h>
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+#include <linux/hid.h>
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+#include <linux/module.h>
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+
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+#include "hid-ids.h"
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+
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+#define A4_2WHEEL_MOUSE_HACK_7 0x01
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+#define A4_2WHEEL_MOUSE_HACK_B8 0x02
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+
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+struct a4tech_sc {
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+ unsigned long quirks;
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+ unsigned int hw_wheel;
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+ __s32 delayed_value;
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+};
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+
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+static int a4_input_mapped(struct hid_device *hdev, struct hid_input *hi,
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+ struct hid_field *field, struct hid_usage *usage,
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+ unsigned long **bit, int *max)
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+{
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+ struct a4tech_sc *a4 = hid_get_drvdata(hdev);
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+
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+ if (usage->type == EV_REL && usage->code == REL_WHEEL)
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+ set_bit(REL_HWHEEL, *bit);
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+
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+ if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007)
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+ return -1;
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+
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+ return 0;
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+}
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+
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+static int a4_event(struct hid_device *hdev, struct hid_field *field,
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+ struct hid_usage *usage, __s32 value)
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+{
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+ struct a4tech_sc *a4 = hid_get_drvdata(hdev);
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+ struct input_dev *input;
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+
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+ if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput ||
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+ !usage->type)
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+ return 0;
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+
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+ input = field->hidinput->input;
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+
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+ if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8) {
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+ if (usage->type == EV_REL && usage->code == REL_WHEEL) {
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+ a4->delayed_value = value;
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+ return 1;
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+ }
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+
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+ if (usage->hid == 0x000100b8) {
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+ input_event(input, EV_REL, value ? REL_HWHEEL :
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+ REL_WHEEL, a4->delayed_value);
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+ return 1;
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+ }
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+ }
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+
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+ if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) {
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+ a4->hw_wheel = !!value;
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+ return 1;
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+ }
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+
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+ if (usage->code == REL_WHEEL && a4->hw_wheel) {
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+ input_event(input, usage->type, REL_HWHEEL, value);
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+ return 1;
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+ }
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+
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+ return 0;
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+}
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+
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+static int a4_probe(struct hid_device *hdev, const struct hid_device_id *id)
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+{
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+ struct a4tech_sc *a4;
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+ int ret;
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+
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+ a4 = kzalloc(sizeof(*a4), GFP_KERNEL);
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+ if (a4 == NULL) {
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+ dev_err(&hdev->dev, "can't alloc device descriptor\n");
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+ ret = -ENOMEM;
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+ goto err_free;
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+ }
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+
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+ a4->quirks = id->driver_data;
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+
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+ hid_set_drvdata(hdev, a4);
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+
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+ ret = hid_parse(hdev);
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+ if (ret) {
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+ dev_err(&hdev->dev, "parse failed\n");
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+ goto err_free;
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+ }
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+
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+ ret = hid_hw_start(hdev);
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+ if (ret) {
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+ dev_err(&hdev->dev, "hw start failed\n");
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+ goto err_free;
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+ }
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+
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+ return 0;
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+err_free:
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+ kfree(a4);
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+ return ret;
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+}
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+
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+static void a4_remove(struct hid_device *hdev)
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+{
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+ struct a4tech_sc *a4 = hid_get_drvdata(hdev);
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+
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+ hid_hw_stop(hdev);
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+ kfree(a4);
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+}
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+
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+static const struct hid_device_id a4_devices[] = {
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+ { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU),
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+ .driver_data = A4_2WHEEL_MOUSE_HACK_7 },
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+ { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D),
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+ .driver_data = A4_2WHEEL_MOUSE_HACK_B8 },
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+ { }
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+};
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+MODULE_DEVICE_TABLE(hid, a4_devices);
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+
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+static struct hid_driver a4_driver = {
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+ .name = "a4tech",
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+ .id_table = a4_devices,
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+ .input_mapped = a4_input_mapped,
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+ .event = a4_event,
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+ .probe = a4_probe,
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+ .remove = a4_remove,
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+};
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+
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+static int a4_init(void)
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+{
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+ return hid_register_driver(&a4_driver);
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+}
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+
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+static void a4_exit(void)
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+{
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+ hid_unregister_driver(&a4_driver);
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+}
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+
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+module_init(a4_init);
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+module_exit(a4_exit);
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+MODULE_LICENSE("GPL");
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+
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+HID_COMPAT_LOAD_DRIVER(a4tech);
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Jiri Slaby